Year % 2008 3.81172366116838 2009 9.58055783170298 2010 8.30661167313489 2011 6.6281426211044 2012 6.05937220678027 2013 6.01730651081846 2014 6.81325840246745 2015 8.37596711898549 2016 9.24076995498895 2017 9.65589344602212 2018 9.74675740899048 2019 8.82848632528604 2020 8.26363858519242 2021 6.7165328726564 2022 6.10227541793395